diff options
| author | Wenjing Liu <wenjing.liu@amd.com> | 2026-01-20 22:40:07 +0000 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-02-03 16:40:06 -0500 |
| commit | 9d6bd60695806782bec8562ab73aefafce067f05 (patch) | |
| tree | 3152c116daf6fd6f2f5f8fdb9c110378b10abf77 | |
| parent | e121ccca8a4a5dd6fb5d395de6ef31ebfce7fb38 (diff) | |
| download | linux-9d6bd60695806782bec8562ab73aefafce067f05.tar.gz linux-9d6bd60695806782bec8562ab73aefafce067f05.zip | |
drm/amd/display: Fix a NULL pointer dereference in dcn20_hwseq.c
[why]
hws->funcs.dccg_init is accessed without checking if it is NULL, which
may lead to a NULL pointer dereference.
[how]
Add a NULL check before calling dccg_init.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c index 87a1dc27def4..307e8f8060e6 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c @@ -3140,7 +3140,8 @@ void dcn20_fpga_init_hw(struct dc *dc) dcn10_hubbub_global_timer_enable(dc->res_pool->hubbub, true, 2); - hws->funcs.dccg_init(hws); + if (hws->funcs.dccg_init) + hws->funcs.dccg_init(hws); if (dc->res_pool->dccg && dc->res_pool->dccg->funcs && dc->res_pool->dccg->funcs->refclk_setup) dc->res_pool->dccg->funcs->refclk_setup(dc->res_pool->dccg); |